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MCQs

Total Questions : 242 | Page 8 of 25 pages
Question 71.


Location of soundings by two angles from the shore requires establishing



  1.    one range line parallel to shore
  2.    one range line perpendicular to shore
  3.    two range lines mutually perpendicular
  4.    no range line.
 Discuss Question
Answer: Option D. -> no range line.


Question 72.

The variation of atmospheric potential is caused due to :



  1.    difference in temperature over the surface of the earth
  2.    change in the density of air
  3.    both (a) and (b)
  4.    neither (a) nor (b).
 Discuss Question
Answer: Option C. -> both (a) and (b)


Question 73.


Location of soundings by range and one angle is done by the surveyor



  1.    on the shore
  2.    on the boat
  3.    on the shore or on the boat
  4.    none of the above.
 Discuss Question
Answer: Option C. -> on the shore or on the boat


Question 74.


A roadstead :



  1.    is a protected area of water where boats can move safely
  2.    is the end of the road at the harbour
  3.    may be protected by break water walls
  4.    none of these.
 Discuss Question
Answer: Option A. -> is a protected area of water where boats can move safely


Question 75.

In a wet dock system,



  1.    minimum required depth of water for the vessels is maintained
  2.    entrance locks are provided with massive gates
  3.    the locks of dock gate are operated by means of heavy bascule bridges and connected machinery
  4.    the cost of construction is quite heavy
  5.    all the above.
 Discuss Question
Answer: Option E. -> all the above.


Question 76.


Pick up the correct statement from the following:



  1.    The tides at any place occur a little less than 1 hour later, each succeeding day
  2.    The difference in time in solar hours and minutes from any lunar transit to the succeeding transit, is called high water level
  3.    The influence of the earth's gravity alone produces level-tidal less sea
  4.    The spinning force is maximum at the equator and zero at the poles
  5.    All of the above.
 Discuss Question
Answer: Option E. -> All of the above.


Question 77.


The width of the entrances of the harbours is restricted to



  1.    100 m
  2.    125 m
  3.    150 m
  4.    180 m
 Discuss Question
Answer: Option D. -> 180 m


Question 78.


Pick up the incorrect statement from the following:



  1.    As a wave of sea water approaches the coast line, it is generally accompanied by a drift of water in the direction of wave advance
  2.    The on-shore wind helps to produce wave action as well as rise of M.S.L
  3.    A falling hydraulic gradient occurs in the direction of the wave
  4.    The wave while receding carries finer particles out to deep water.
 Discuss Question
Answer: Option C. -> A falling hydraulic gradient occurs in the direction of the wave


Question 79.


Soundings are required for



  1.    making nautical charts for navigation
  2.    ascertaining the areas subject to scour or silting
  3.    obtaining detailed information for construction
  4.    all the above.
 Discuss Question
Answer: Option D. -> all the above.


Question 80.


Pick up the correct statement from the following:



  1.    a harbour without any port complex, is called a refuge harbour
  2.    a harbour used for fishery, is called fishery harbour
  3.    the terminal building of a commercial harbour consists of an administrative block, customs clearance and ware-houses.
  4.    all the above.
 Discuss Question
Answer: Option D. -> all the above.


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